北斗三号卫星导航定位性能提升的定量分析Quantitative analysis of navigation positioning performance index improvement of Beidou-3 satellite
宋华松;万磊;谷玉宝;
摘要(Abstract):
为了定量研究BDS-3卫星加入BDS系统后,对BDS系统定位性能的改善情况。该文在平均可见卫星数、平均PDOP值的基础上,构建出可见卫星数提升度D_(NSAT)、PDOP值改善度D_(PDOP)、定位精度提升度D_(spp)、最大截止卫星高度角扩展度DMA、系统可用性KS、区域精细度DD_(PDOP)等定位性能评价指标,对每颗BDS-3卫星加入后BDS系统的定位性能进行了定量分析。结果表明,BDS-3不仅扩大了BDS-2的覆盖范围,还提升了BDS系统的各项性能指标;在PDOP阈值为1.5、2.0、2.5时,亚太地区加入8颗BDS-3卫星后,相比BDS-2系统可用性增加了94.25%、49.72%、7.86%,DD_(PDOP)值改善了76.5%;在PDOP阈值为4.0、5.0、6.0时,全球范围加入8颗BDS-3卫星后,相比BDS-2可用性增加了12.98%、11.54%、16.38%,DD_(PDOP)值改善了58.0%。
关键词(KeyWords): 北斗三号;性能指标;定量分析;可见卫星数;PDOP
基金项目(Foundation): 安徽省教育厅自然科学基金项目(KJ2018JD04)
作者(Authors): 宋华松;万磊;谷玉宝;
DOI: 10.16251/j.cnki.1009-2307.2019.11.003
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